you can get good grades ＿＿hard A.to work B.in woyou can get good _英语解答

you can get good grades ＿＿hard A.to work B.in wo
you can get good grades ＿＿hard A.to work B.in working C.by work D.by working 为什么选D

人气：416 ℃　时间：2019-12-09 10:54:25

解答

by加doing表示通过什么方式这题是我们通过努力学习来得到好成绩